30.4 Premium Subsidies and Cost-Sharing
Key Takeaways
Premium tax credits lower monthly premiums based on income and benchmark plan costs.
Credits are advanceable and reconciled on the tax return.
Cost-sharing reductions apply to eligible Silver plans and raise actuarial value.
2026 out-of-pocket maximums ($10,600 individual, $21,200 family) cap annual cost-sharing for covered services.
Employer coverage can affect subsidy eligibility and affordability tests apply.
Accurate income reporting helps avoid repayment at tax time.
The ACA provides financial assistance to help individuals and families afford health insurance. There are two main types of assistance: Premium Tax Credits (PTCs) that lower monthly premiums, and Cost-Sharing Reductions (CSRs) that lower out-of-pocket costs.
Premium Tax Credits (PTCs)
How PTCs Work
| Feature | Details |
|---|---|
| Type | Refundable tax credit |
| Delivery | Advance (monthly) or at tax time |
| Purpose | Reduce monthly premium cost |
| Calculation | Based on income and benchmark plan |
Eligibility Requirements
| Requirement | Details |
|---|---|
| Income | 100-400% FPL for 2026 (the 400% limit was lifted only for 2021-2025) |
| Coverage source | Not eligible for employer coverage or government program |
| Tax filing | Must file federal tax return |
| Legal status | U.S. citizen or lawfully present |
Income Thresholds for 2026 Coverage (2025 Poverty Guidelines)
| Household Size | 100% FPL | 400% FPL |
|---|---|---|
| 1 | $15,650 | $62,600 |
| 2 | $21,150 | $84,600 |
| 3 | $26,650 | $106,600 |
| 4 | $32,150 | $128,600 |
Enhanced Subsidies (2021-2025, Expired)
| Change | Impact |
|---|---|
| Premium cap | 8.5% of income maximum |
| No income cliff | Subsidies continue above 400% FPL |
| Lower contributions | Reduced premium contributions at all income levels |
| $0 premiums | Many low-income enrollees pay nothing |
Key Point: From 2021 through 2025 the enhanced subsidies removed the 400% FPL income cliff and capped benchmark Silver premiums at 8.5% of household income. They expired at the end of 2025: for 2026 the credit again stops at 400% FPL, and the top required contribution is 9.96% of income.
How Premium Tax Credits Are Calculated
The Benchmark Plan
| Feature | Details |
|---|---|
| Definition | Second-lowest cost Silver plan in your area |
| Purpose | Used to calculate subsidy amount |
| Enrollment | You don't have to choose this plan |
| Variation | Changes each year, varies by location |
Calculation Formula
| Step | Action |
|---|---|
| 1 | Determine household income as % of FPL |
| 2 | Find expected contribution percentage |
| 3 | Calculate annual contribution (income × %) |
| 4 | Find benchmark plan premium |
| 5 | Subtract contribution from benchmark = PTC |
2026 Applicable Percentages (Rev. Proc. 2025-25)
| Income (% FPL) | Expected Contribution (% of Income) |
|---|---|
| Under 133% | 2.10% |
| 133-150% | 3.14-4.19% |
| 150-200% | 4.19-6.60% |
| 200-250% | 6.60-8.44% |
| 250-300% | 8.44-9.96% |
| 300-400% | 9.96% |
| Above 400% | No premium tax credit |
Using the Tax Credit
| Option | How It Works |
|---|---|
| Advance Payment | Credit paid monthly to insurer |
| Full at tax time | Wait and claim on tax return |
| Partial advance | Take some monthly, rest at tax time |
Cost-Sharing Reductions (CSRs)
What CSRs Do
| Feature | Details |
|---|---|
| Purpose | Lower deductibles, copays, out-of-pocket max |
| Applies to | Silver plans only |
| Effect | Increases actuarial value of plan |
| Delivery | Automatic when you enroll |
CSR Eligibility
| Income Level | Silver Plan AV | Benefits |
|---|---|---|
| 100-150% FPL | 94% (vs. 70%) | Greatly reduced cost-sharing |
| 150-200% FPL | 87% (vs. 70%) | Significantly reduced cost-sharing |
| 200-250% FPL | 73% (vs. 70%) | Moderately reduced cost-sharing |
| Native Americans (all incomes) | 100% | Zero cost-sharing |
CSR Example
| Cost | Standard Silver | 94% CSR Silver |
|---|---|---|
| Deductible | $3,000 | $75 |
| Primary care copay | $40 | $5 |
| Specialist copay | $80 | $10 |
| OOP Maximum | $10,600 | $1,500 |
Exam Tip: CSRs are only available with Silver plans. Even if you qualify for CSRs, you won't receive them if you choose Bronze, Gold, or Platinum. This is why Silver can be the best value for CSR-eligible enrollees.
Reconciliation at Tax Time
Advance PTC vs. Actual Entitlement
| Scenario | What Happens |
|---|---|
| Income lower than estimated | Get additional credit (refund) |
| Income higher than estimated | May owe money back |
| Significant income increase | Could owe substantial repayment |
Repayment Limits
| Tax Year | Repayment of Excess Advance Credits |
|---|---|
| Before 2026 | Capped for household income under 400% FPL |
| 2026 and later | No cap: the full excess must be repaid |
Key Point: Report income changes promptly! If your income changes significantly during the year, you should update your Marketplace application to avoid a large reconciliation at tax time.
2026 Out-of-Pocket Maximums
Annual Limits
| Coverage | 2026 Maximum |
|---|---|
| Individual | $10,600 |
| Family | $21,200 |
| Embedded individual (in family plan) | $10,600 |
What Counts Toward OOP Max
| Counts | Doesn't Count |
|---|---|
| Deductibles | Monthly premiums |
| Copays | Balance billing |
| Coinsurance | Out-of-network costs (some plans) |
| Non-covered services |
Employer Coverage and Subsidies
Affordable Employer Coverage Test
| Requirement | 2026 Threshold |
|---|---|
| Self-only coverage | Must cost ≤9.96% of household income |
| If affordable | NOT eligible for marketplace subsidies |
| If unaffordable | CAN get marketplace subsidies |
Family Glitch Fix (2023)
| Pre-2023 | Post-2023 |
|---|---|
| Affordability based on employee-only cost | Can consider family coverage cost |
| Family members often ineligible | Family members may qualify for subsidies |
Exam Tip: The "family glitch fix" in 2023 allows family members to get Marketplace subsidies if family coverage (not just employee coverage) would exceed the year's affordability percentage (9.96% for 2026) of household income, even when the employee has access to affordable self-only coverage.
Key Takeaways
- Premium tax credits lower monthly premiums based on income and benchmark plan costs.
- Credits are advanceable and reconciled on the tax return.
- Cost-sharing reductions apply to eligible Silver plans and raise actuarial value.
- 2026 out-of-pocket maximums ($10,600 individual, $21,200 family) cap annual cost-sharing for covered services.
- Employer coverage can affect subsidy eligibility and affordability tests apply.
- Accurate income reporting helps avoid repayment at tax time.
Under the enhanced ACA subsidies (2021-2025), what was the maximum percentage of income anyone had to pay for a benchmark Silver plan?
6.5%
8.5%
9.5%
10%
Cost-Sharing Reductions (CSRs) are only available with which metal tier?
Bronze plans
Silver plans
Gold plans
Any metal tier
What happens if your actual income at tax time is higher than what you estimated when enrolling in a Marketplace plan with advance premium tax credits?
Nothing—your subsidy amount is locked in
You may have to repay some or all of the excess credits
Your coverage is automatically cancelled
You receive additional credits as a bonus
The "benchmark plan" used to calculate premium tax credits is:
The lowest-cost Bronze plan in your area
The second-lowest cost Silver plan in your area
The highest-cost Gold plan in your area
Any plan you choose to purchase
Sections you finish are checked off in the contents.